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| author |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-07-26 08:53:06 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-07-26 16:24:14 +0200 |
| commit | 0f6f281b731d20bfe75c13f85d33f3f05b440222 (patch) | |
| tree | 0f8c23d3fca50dd2830ddc978501cd45a0057f45 /arch/s390/defconfig | |
| parent | s390/ipl: Use diagnose 8 command separation (diff) | |
| download | linux-dev-0f6f281b731d20bfe75c13f85d33f3f05b440222.tar.xz linux-dev-0f6f281b731d20bfe75c13f85d33f3f05b440222.zip | |
s390/mm: downgrade page table after fork of a 31 bit process
The downgrade of the 4 level page table created by init_new_context is
currently done only in start_thread31. If a 31 bit process forks the
new mm uses a 4 level page table, including the task size of 2<<42
that goes along with it. This is incorrect as now a 31 bit process
can map memory beyond 2GB. Define arch_dup_mmap to do the downgrade
after fork.
Cc: stable@vger.kernel.org
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions